refactor: modularizar como PocketSync con soporte de perfiles

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pocketsync.py

@@ -0,0 +1,26 @@
+import os
+import sys
+import tkinter as tk
+
+# Asegurar que el directorio raíz esté en el path para imports relativos
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+if BASE_DIR not in sys.path:
+    sys.path.insert(0, BASE_DIR)
+
+from core.config import ConfigManager
+from ui.app import PocketSyncApp
+
+CONFIG_FILE = os.path.join(BASE_DIR, "config.json")
+
+
+def main() -> None:
+    cm = ConfigManager(CONFIG_FILE)
+    cm.load()
+
+    root = tk.Tk()
+    PocketSyncApp(root, cm)
+    root.mainloop()
+
+
+if __name__ == "__main__":
+    main()